Semi-automatic telephone-exchange system.



1,232,250. Patented July 3, 1917. 4 22 SHEETS-SHEET I.

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RWIONIATIC TELEPHONE EXCHANGE SYSTEM;

APPLICATION msn sEPr. a. 1915.

APPLlCATiON FILED SEPT. 8, I9l5.

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Patented July 3, 1917.

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APPLICATION FILED SEPT 8| 1915.

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Patented July 3, 1917.

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APLICATION FILED SEPI. 3,191'5.

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SEMI-AUTOMATIC TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED SEPI. s. I9I5.

1,232,250. Patented July 3,1917.

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SEMI-AUTOMATIC TELEPHDNE EXCHANGE SYSTEM.

APPLICATION msn SEPT. s. 1915.

" Patented .my 3,1917.

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APPLIATION FILED SEPT. 8.1915. l ,232,250. y

Patented July 3, 1917.

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APPLICATION FILED sEPLa. I9I5. Patented July 3, 191i.l

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APPLICATION FILED SEPT. B. ISIS- Patented July 3, 1917.

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SEMI-AUTOMATIC TELEPHONE EXCHANGE SYSTEM.

APPLICATION FILED SEPT. B. I9I5.

1,232,250. Patented July 3, '1917.

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APPLICATIQN FILED SEPT B, ISIS- Patented July 3,1917.

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1,.32,250.4 Patented July 3,1917.

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